* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-tertiary: #0f3460;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --accent-green: #4ade80;
  --accent-green-dark: #22c55e;
  --accent-red: #ef4444;
  --overlay-bg: rgba(0, 0, 0, 0.85);
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

html, body {
  height: 100%;
  width: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  touch-action: manipulation;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  padding-top: var(--safe-top);
  padding-bottom: var(--safe-bottom);
  padding-left: var(--safe-left);
  padding-right: var(--safe-right);
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: var(--bg-secondary);
  flex-shrink: 0;
}

.header-left {
  flex-shrink: 0;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.avatar-placeholder {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  padding: 0 12px;
}

.brand-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.brand-handle {
  font-size: 12px;
  color: var(--text-secondary);
}

.history-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 8px;
  cursor: pointer;
  border-radius: 8px;
  transition: background-color 0.2s, color 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.history-btn-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 2px;
}

.history-btn:active {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  gap: 32px;
}

.score-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.score {
  font-size: clamp(80px, 25vw, 200px);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
  text-align: center;
  line-height: 1;
  letter-spacing: -0.02em;
}

.increment-btn {
  width: clamp(100px, 30vw, 140px);
  height: clamp(100px, 30vw, 140px);
  border-radius: 50%;
  background: linear-gradient(145deg, var(--accent-green) 0%, var(--accent-green-dark) 100%);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 8px 32px rgba(74, 222, 128, 0.3);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.increment-btn:active {
  transform: scale(0.95);
  box-shadow: 0 4px 16px rgba(74, 222, 128, 0.4);
}

.footer {
  padding: 16px 20px;
  padding-bottom: calc(16px + var(--safe-bottom));
  flex-shrink: 0;
}

.finish-btn {
  width: 100%;
  padding: 18px 32px;
  font-size: 18px;
  font-weight: 600;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: none;
  border-radius: 14px;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.15s;
}

.finish-btn:active {
  background-color: var(--bg-secondary);
  transform: scale(0.98);
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--overlay-bg);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: var(--safe-top) var(--safe-right) var(--safe-bottom) var(--safe-left);
}

.overlay.active {
  display: flex;
}

.overlay-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 40px;
}

.result-label {
  font-size: clamp(28px, 8vw, 36px);
  font-weight: 700;
  color: var(--accent-green);
  text-align: center;
  margin: 0;
}

.result-message {
  font-size: clamp(16px, 4vw, 20px);
  font-weight: 400;
  color: var(--text-secondary);
  text-align: center;
  margin: 0;
}

.score-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-top: 8px;
}

.score-text {
  font-size: clamp(24px, 6vw, 32px);
  font-weight: 500;
  color: var(--text-secondary);
}

.final-score {
  font-size: clamp(48px, 15vw, 72px);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
  line-height: 1;
}

.engagement-reminder {
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
  margin: 0;
  opacity: 0.7;
}

.overlay-buttons {
  display: flex;
  gap: 16px;
  margin-top: 20px;
  width: 100%;
  max-width: 300px;
}

.overlay-btn {
  flex: 1;
  padding: 16px 24px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.15s, opacity 0.2s;
}

.overlay-btn:active {
  transform: scale(0.96);
}

.overlay-btn.primary {
  background: linear-gradient(145deg, var(--accent-green) 0%, var(--accent-green-dark) 100%);
  color: white;
}

.overlay-btn.secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.history-drawer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 80vh;
  background-color: var(--bg-secondary);
  border-radius: 24px 24px 0 0;
  padding: 20px;
  padding-bottom: calc(20px + var(--safe-bottom));
  display: flex;
  flex-direction: column;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.history-header h2 {
  font-size: 20px;
  font-weight: 700;
}

.close-history-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 8px;
  cursor: pointer;
  border-radius: 8px;
}

.close-history-btn:active {
  background-color: var(--bg-tertiary);
}

.history-list {
  flex: 1;
  overflow-y: auto;
  margin-bottom: 16px;
  min-height: 100px;
  max-height: 40vh;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  background-color: var(--bg-primary);
  border-radius: 10px;
  margin-bottom: 8px;
}

.history-date {
  font-size: 14px;
  color: var(--text-secondary);
}

.history-score {
  font-size: 20px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent-green);
}

.history-empty {
  text-align: center;
  color: var(--text-secondary);
  padding: 40px 20px;
  font-size: 14px;
}

.history-actions {
  display: flex;
  gap: 12px;
}

.history-action-btn {
  flex: 1;
  padding: 14px;
  font-size: 14px;
  font-weight: 600;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.15s;
}

.history-action-btn:active {
  transform: scale(0.96);
}

.history-action-btn.danger {
  background-color: rgba(239, 68, 68, 0.2);
  color: var(--accent-red);
}

.confirm-dialog {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--overlay-bg);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 20px;
}

.confirm-dialog.active {
  display: flex;
}

.confirm-content {
  background-color: var(--bg-secondary);
  padding: 24px;
  border-radius: 16px;
  max-width: 300px;
  width: 100%;
  text-align: center;
}

.confirm-content p {
  font-size: 16px;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.confirm-buttons {
  display: flex;
  gap: 12px;
}

.confirm-btn {
  flex: 1;
  padding: 14px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.15s;
}

.confirm-btn:active {
  transform: scale(0.96);
}

.confirm-btn.cancel {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.confirm-btn.confirm {
  background-color: var(--accent-red);
  color: white;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
  }
}